InSPAration Spa & Bath Crystals also effectively mask chemical odors, but will not harm or stain acrylic, woods, fiberglass, or plaster surfaces. Has no oily ingredients and will not clog filters or affect hot tub water chemistry.

Product notes: Use 2-6 ounces for spas and 1-3 ounces for bath tubs, depending upon gallonage and personal preferences.